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    <title>Document</title>
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    <script>
        // 1、利用for循环输出1——100岁
        for(let year=1;year<=100;year++){
            document.write(`${year}岁<br>`);
        }
        // 2、求1——100之间所有偶数的合
        let sum=0;
        for(var i=1;i<=100;i++){
            if(i%2===0){
                sum+=i
            }
        }
        console.log(sum);
    </script>
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